Issue Description
After creating a custom pattern to use as a line type, copying and pasting into the pattern box does not work. The row of 'X's remain.
Solution
The only 2D tools you can use to create a line type are the Line and the Arc/Circle tool. The Polyline and the Spline Tool will not copy and paste as a line-type component.
When creating a custom Line Type, create the pattern using the Line or Arc/Circle Tool only. If you need to have a shape drawn by the Polyline or Spline you can if you follow these steps:
1. Draw the shape
2. Select the line tool
3. Magic wand the shape. This will trace the shape using only lines and arcs.
4. Delete the Polyline/Spline
5. You can then copy and paste the elements that remain.
Tip: More settings for Line creating custom lines can be found Here